 English picture quiz. Countable or uncountable? Tell whether the following are countable or uncountable. Number one. Tomato. Countable. Two. Broccoli. Uncountable. Three. Celery. Uncountable. Four. Potato. Countable. Five. Corn. Uncountable. To learn more about this topic, see video at link. Or check out our websites for more free English learning resources.